The purpose of this project was to produce a succinct, educational report (Primer) for use by the drinking water utility industry outlining the current state of scientific understanding regarding the potential impacts of global climate change on water utilities, water supply, demand, and relevant water quality. Utilizing input from industry and science participants, the report includes a summary of the relevant science that explains the linkages between climate change and the hydrologic cycle and outlines what is known and unknown about future changes in regional hydrologic conditions. The report also discusses planning and response strategies. Contains CD with the full searchable Primer, with extensive links to additional reference materials; color pages throughout.